• Thorns are woody, sharply pointed branch stems (e.g. honey locust). • Spines are small, unbranched, sharp outgrowths of leaf tissue in which the parenchyma is replaced by sclerenchyma (e.g. cactus). • Prickles are small pointed outgrowths from the epidermis or cortex of the stem (e.g. rose and raspberry). • Cladophylls are flattened main stems that resemble leaves (e.g. butcher's-broom, greenbrier, and some orchids). Edible asparagus shoots left to grow produce many small fern-like cladophylls. • Stipules are paired scales, glands, or leaf-like structures at the base of the petiole formed from leaf or stem tissue (e.g. black locust). • Bracts are modified leaves at the base of flowers or flower stalks. Some are highly-
This is the end of the preview.
access the rest of the document.
Stolons, leaf tissue, e.g. honey locust, Edible asparagus shoots